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NTC7161LR - Coolant Expansion Tank Cap – 15 psi by LAND ROVERCooling or Heating Part Land Rover Range Rover Defender, Discovery, Range Rover

NTC7161LR - Coolant Expansion Tank Cap – 15 psi

- €36,10
€36,10
€36,10 - €36,10
€36,10
Genuine Part
Genuine: Original manufacturer part. This product is the original part designed and produced by the vehicle manufacturer.
Coolant Expansion Tank Cap - pressure cap for the cooling system expansion tank, rated at 15 psi.

The cap seals the expansion tank and regulates system pressure: it holds the circuit at its working pressure to raise the coolant boiling point, venting through an integral relief valve once 15 psi is exceeded. As the engine cools, the vacuum valve allows coolant to be drawn back into the circuit, maintaining the correct system level.
Vehicle Model Land Rover Defender up to 2016
Land Rover Discovery 1 1989-1998 (L318)
Range Rover Classic up to 1994
Fitment Notes DEFENDER 1986-2006 — 2.5L TDi, coolant expansion tank pressure cap, 15psi
DISCOVERY 1 1989-1998 — TDi, 2.0L MPi Petrol and V8 EFi; 15psi
RANGE ROVER CLASSIC — TDi Diesel Turbo (1992-1994 from VIN JA610294); V8 EFi to (V) FA399972 and petrol engines from (V) MA647645; 15psi
Alternative Codes
NTC7161LRNTC7161

Available to order 2–3 weeks

Not currently in stock. Order now — typically ships within 2–3 weeks.

Need it faster? Contact us about express import (2–5 business days).

When will my order arrive?

This item is ordered from our supplier on request. Typical lead time is 2–3 weeks from order confirmation.

  • Netherlands / Belgium / Germany: 2–4 working days after dispatch.
  • Other EU countries + UK: 4–8 working days after dispatch.
  • Outside EU/UK: contact us for an estimate.

Need it faster? Express import available in 2–5 business days — contact us before ordering.

Job kits containing this part

This part is included in 0 job kit(s) below. Pick the kit that matches your vehicle and job, then add what you need.

Frequently asked questions

What does this coolant expansion tank cap do?
The NTC7161LR is the genuine Land Rover coolant expansion tank cap, rated at 15 psi. It seals the expansion tank and regulates system pressure: it raises the coolant boiling point, vents through a relief valve above 15 psi, and lets coolant back in via a vacuum valve as the engine cools. It fits TDi and petrol Defender, Discovery 1 and Range Rover Classic.
How do I know the cap has failed?
A failed expansion tank cap usually can't hold its 15 psi rating because the seal has hardened or the valve has stuck. Symptoms include overheating, coolant boiling or loss, and a system that won't build pressure. Because it's inexpensive, it's worth replacing early when chasing a cooling fault.
Why is the 15 psi rating important on this cap?
The 15 psi rating sets the pressure at which the cap vents, which fixes the coolant boiling point for these engines. Using a cap with a different rating can cause overheating or over-pressurise the radiator and hoses. Always match the 15 psi cap specified for TDi and petrol Defender, Discovery 1 and Range Rover Classic.

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